From 0e8e5d26a0ac5e766b6610e1f305a9877ee89a36 Mon Sep 17 00:00:00 2001
From: jow <jow@3c298f89-4303-0410-b956-a3cf2f4a3e73>
Date: Tue, 5 Oct 2010 19:20:27 +0000
Subject: [PATCH 1/1] [include] package-ipkg.mk: build sysupgrade keepfile
 hints out of conffiles not yet present in the package. This applies to config
 directories or files that do not exist but may be created by the user after
 package installation.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@23257 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 include/package-ipkg.mk | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/package-ipkg.mk b/include/package-ipkg.mk
index a07c5cc38..512e40186 100644
--- a/include/package-ipkg.mk
+++ b/include/package-ipkg.mk
@@ -49,6 +49,7 @@ ifeq ($(DUMP),)
     IPKG_$(1):=$(PACKAGE_DIR)/$(1)_$(VERSION)_$(PKGARCH).ipk
     IDIR_$(1):=$(PKG_BUILD_DIR)/ipkg-$(PKGARCH)/$(1)
     INFO_$(1):=$(IPKG_STATE_DIR)/info/$(1).list
+    KEEP_$(1):=$(strip $(call Package/$(1)/conffiles))
 
     ifeq ($(if $(VARIANT),$(BUILD_VARIANT)),$(VARIANT))
     ifdef Package/$(1)/install
@@ -112,6 +113,20 @@ ifeq ($(DUMP),)
 	(cd $$(IDIR_$(1))/CONTROL; \
 		$($(1)_COMMANDS) \
 	)
+
+    ifneq ($$(KEEP_$(1)),)
+		@( \
+			keepfiles=""; \
+			for x in $$(KEEP_$(1)); do \
+				[ -f "$$(IDIR_$(1))/$$$$x" ] || keepfiles="$$$${keepfiles:+$$$$keepfiles }$$$$x"; \
+			done; \
+			[ -z "$keepfiles" ] || { \
+				mkdir -p $$(IDIR_$(1))/lib/upgrade/keep.d; \
+				for x in $$$$keepfiles; do echo $$$$x >> $$(IDIR_$(1))/lib/upgrade/keep.d/$(1); done; \
+			}; \
+		)
+    endif
+
 	$(IPKG_BUILD) $$(IDIR_$(1)) $(PACKAGE_DIR)
 	@[ -f $$(IPKG_$(1)) ]
 
-- 
2.20.1